Fluxi 2000/TZ Turbine Gas Meter

Transcription

1 Fluxi 2000/TZ Turbine Gas Meter Turbine gas meters are flow meters. The flow of gas turns a turbine wheel, and thus, the rotating speed of the turbine is proportional to the linear speed of the gas. The movement is mechanically transmitted to the totaliser through the magnetic coupling. SIC FETURES»» PT approved with only 2 DN inlet straight pipe, 0 (zero) DN outlet pipe even with severe perturbations»» MID approved»» Go beyond compliance with all current European and International Standards DESCRIPTION The Fluxi 2000/TZ meter is composed of five main parts: a body containing all the components; a flow straightener to stabilise and accelerate the gas flow before the turbine wheel; a measuring unit including the turbine wheel; a magnetic coupling to transmit the movement of the turbine wheel to the totaliser; a totaliser to register the measured gas. PPICTIONS Fluxi 2000/TZ meters are designed to measure natural gas, and various filtered, and non-corrosive gases. They are used to measure medium to high gas flow, at low, medium or high pressure. The Fluxi 2000/TZ meters have been optimised for use in all applications related to the transportation and distribution of gas. Fluxi 2000/TZ meters are approved for fiscal use. 1 5»» Reduced pressure loss for low pressure network»» Excellent high-pressure behaviour 4»» IP 67 protection of the totaliser»» Equipped as standard with the cyble target.»» Various options available: integrated thermowells, oil pump, pulse 2 3 transmitters, etc Technical Specifications Metrological pprovals Compliant with the Measuring Instrument Directive 2004/22/EC pproval number: DE-10-MI002-PT001 Intrinsic Safety pproval Compliant with the Directive 94/9/EC pproval number: CIE 06 TEX 6031 X Flow Rate From 5 m 3 /h to m 3 /h, G65 to G6500. Nominal Diameters From DN50 to DN400 mm (2 to 16 ). Maximum Working Pressure Mounting ody Materials Up to 100 bar depending on the body material and flanging. The Fluxi 2000/TZ meters can be installed either horizontally or vertically, for the DN50 to DN300, and horizontally for the DN400. Ductile iron, cast steel or welded steel. Compliant with the Pressure Equipment Directive 97/23/EC Temperature Range TEX/PED: -30 C to +60 C MID: -25 C to +55 C Storage temperature: -40 C to +70 C SPECIFICTIONS

2 MID ccur acy Totaliser:» 9-digit index to register a larger volume» 45 orientation for an easy reading» Free-rotating totaliser» Equipped as standard with the cyble target: it allows the installation of the cyble sensor at any time.» Equipped with 1 built-in silicagel cartridge; as an option, equipped with an external cartridge to enable easy maintenance even in extreme conditions» Fitted with a refl ecting disc on the fi rst drum.» Integrated optical disc to facilitate the periodic calibration of the meter.» Customised name plate (logo, barcode, customer serial number...)» IP67 protection» UV resistant» Unit: m 3 METROOGY In accordance with MID and OIM. Depending on the G size and the DN, the meters are available with a rangeability of 1:20 or 1:30. ccording to the PT TR G7, for high-pressure tests, the rangeability can be extended to 1:50, depending on the pressure. In line with MID, the maximum permissible error is +/-2 %, from Qmin to 0.2 Qmax, and +/-1% from 0.2 Qmax to Qmax. The WME (Weighted Measured Error) is less than 0.4%. Typical Itron accuracy is: +/-1% from Qmin to 0.2 Qmax, +/-0.5% from 0.2 Qmax to Qmax. 3 Error in % ow Pressure Curve 2 High Pressure Curve 1 Typical Itron ccuracy % max flow Universal totaliser fi tted as standard with the Cyble target MGNET F2 T F1 Transmitters Cyble sensor: It can be delivered mounted onto the meter or installed afterwards at any time. The Cyble sensor is a bounce-free transmitter. It allows also the counting of eventual back fl ows. ow Frequency (F): Two Reed switches are fi tted as standard on the whole range. nti-tampering (T): this device is fi tted as standard on the whole range. Medium Frequency (MF): one transmitter is supplied as an option. High Frequency (HF): up to 4 transmitters are supplied as an option on the whole range. Mechanical drive: the totaliser can be fi tted with this option, it may be used to drive removable accessories. The mechanical drive is designed according to EN Depending of the G size, the blades of the turbine wheel are oriented at 45 or 60. Turbine wheel at 60 is used to avoid over-speed of the wheel. When a HF3 is requested, the wheel must be in aluminium. For high pressure use, or for measuring dirty gases, an aluminium wheel is recommended. Flow Straightener This device stabilises and accelerates the fl ow before the turbine wheel. It has been designed to meet the requirements of the 2 perturbation tests defi ned in the EN12261 (low level and high level perturbation). ll DN meet the requirements of the low level perturbation test without an additional device with only 2 DN inlet straight pipe, 0 DN outlet of the meter. 5 7 Oil pump n oil pump is supplied as an option, which lubricates the main ball bearings in the measuring unit. The oiling can be done even when the meter is under pressure. Turbine wheel This is the most important component of the meter for achieving high accuracy at low and high pressure. It can be made from aluminium for the whole range or in polyacetal for the DN 200. From DN50 to DN150, no additional device is required to fulfi l the high level perturbation test with only 2 DN inlet, 0 DN outlet of the meter. From DN200 to DN400, a fl ow conditioner has to be integrated in the inlet of the fl ow straightener to meet the requirements of the high level perturbation test when only 2 DN inlet pipe is available (see in ccessories). The large number of blades fi tted in the fl ow straightener insures an optimal protection in case of perturbated fl ow. 8

3 OPTIONS: Extension for the totaliser This option allows the possibility of increasing the distance between the body of the meter and the index, to facilitate the reading when the meter is covered with ice due to measurement of gas at low temperatures. This device allows the gas pressure to be measured at the reference point. It is installed as standard. The standard pressure tapping is an Ermeto 6S. Measurement of aggressive gases: version with a PTFE (Tefl on) coating is available, as an option up to DN200. CHRCTERISTICS CCESSORIES racket for mounting a volume converter This device allows the Itron PTZ volume converter to be adapted directly onto the meter. Thermowells This device allows the temperature of the measured gas to be read at the reference point, downstream of the turbine. The meter is prepared as standard for the installation of two thermowells which can be mounted in our factory or later when requested. The meter does not need to be recalibrated after retrofi tting of thermowell (as defi ned in the PT type pproval). Flow conditioner For DN50 to DN200, a fl ow conditioner can be supplied for installation between 2 RF fl anges in front of the meter, to further enhance the performance of the meter when subjected to severe perturbation. For DN200 to DN400, the fl ow conditioner can be retrofi tted directly in the inlet of the fl ow straightener. The integration of the fl ow conditioner in the meter provides a very compact solution without need for any extra fl anging. External silicagel cartridge This accessory is used to reinforce the protection of the totaliser against humidity when the meter is installed in extrem conditions. Fluxi 2000/TZ with PTZ CORUS ) Technical data sheet Rangeability and pulse values With correction gears 32/40 (correction 0%) G size DN Max Range- 1 Imp F & Freq F 1 Imp Freq MF 1 Imp Freq HF2 1 Imp Freq HF3 RPM Flow ability Cyble Qmax MF Qmax HF2 Qmax HF3 Qmax Qmax (mm) (m 3 /h) (m 3 /Imp) (Hz) (dm 3 /Imp) (Hz) (dm 3 /Imp) (Hz) (dm 3 /Imp) (Hz) (Rot/min) G G G or G or G G or G or G G or G or G G or G or G G or G or G G or G or G G or G or

4 ody materials and approximate weight (Kg) DN ength of ISO ISO ISO ISO ISO ISO ISO NSI NSI NSI (mm) body (mm) PN 10 PN 16 PN 20 PN 25 PN 40 PN 50 PN : Ductile iron EN-GJS T : Steel (Cast steel GS or welded steel) The pressure and temperature range of the body material, please check your National Rules ) Pressure loss of the Fluxi 2000/TZ meters Pressure losses of the Fluxi 2000/TZ meter (mbar) With integrated G DN Max. Flow Standard flow conditioner size (mm) (m 3 /h) Pr Pr = 0.83kg/m 3. =0.83kg/m 3. T = 0 C. Qmax T=0 C. Qmax G G G G G G G G G G G G G G G G Pressure losses of the Fluxi 2000/TZ meter (mbar) With integrated G DN Max. Flow Standard flow conditioner size (mm) (m 3 /h) Pr Pr = 0.83kg/m 3. =0.83kg/m 3. T = 0 C. Qmax T=0 C. Qmax G G G G G G Where: p: Pressure loss in the calculated conditions pr: Pressure loss in the reference conditions n: Gas density (kg/m 3 ) at 0 C and 1013 mbar Pb: Operating pressure (ar gauge) q: Flow rate (m 3 /h) Qmax: Maximum flow rate (m 3 /h) Tb: Gas temperature ( C). Calculation of pressure loss:

5 d E 113 C) Dimensions (mm) DN C D E E C D * Short version, same length as for the former NM meter X D) Thermowells sizes S Order Number d d Max. Setting X DN Thread with stuffing box bore Cable Depth (S) mm mm & o-ring mm mm Sensor (mm) 50(P)/80/100 G ¼ E Thermowell fi tted with sealing holes 50(HP)/150/200 G ¼ E /500 G ½ E E) Transmitter characteristics Intrinsic safety approval:.c.i.e. 06 TEX 6031 X Intrinsic safety level: Ex II 1/2 G Ex ia IIC T5 c T6 ow Frequency pulse transmitters (F): The F transmitter consists of 2 dry Reed switches, normally open, and controlled by a magnet situated in the fi rst drum of the totaliser. The F connections are without polarity. Inductive transmitters (HF and MF): They are inductive sensors actuated by a toothed disc. The frequency is proportional to the instantaneous fl ow. The polarity of the connections is indicated on the name plate of the meter. F) Installation Each meter is delivered with binder plugs for the installed transmitters and oil when an oil pump is installed. Please refer to the instruction manual supplied with the meter. The advice given therein will ensure optimal use of the Fluxi 2000/TZ meter over the years. 1) Internal Reed contacts» Hermetically sealed contacts Maximum terminal voltage: 30 Volt and maximum current according to EN » mbient temperature Ta = -30 C to +60 C» Minimum pulse time: 0.4 s 2) Cyble sensor» It conforms to CENEEC standard EN with: Ui 14.3 Volt Ii 50 m nti-tampering transmitter (T): 1) High Frequency transmitters» Proximity detectors conform to EN (NMUR) standards.» They conform to CENEEC standards (EN and EN ) with: Ui 15 Volt Ii 50 m Ci 90 nf i 100μH Pi 120 mw» mbient temperature Ta = -30 C to +60 C 2) Medium Frequency transmitter» It conforms to CENEEC standards (EN and EN ) with: Ui 16 Volt Ii 52 m Ci 50 nf i 250μH Pi 64 mw This consists of one dry Reed switch, normally closed. ttempts at magnetic tampering will open the contact. The electrical characteristics are the same as those for the F transmitter